Vampire Counts though a top tear faction in the past, Are now in the lower- middle of the pack. In multiplayer, The community knows how to exploit the gaps in the VC unit roster. Mainly their profound weakness to single unit monsters that have AOE damage.
While other factions can range down larger targets, The main Anti Large tools the VC currently have is Blood night and the Terrorghiest. Both are easy to mitigate in multiplayer. In the case of blood Knights, Players place their monster inside a unit of anti larger infantry. (halberds like) Terrorghiest can be threatened with ranged units.
To resolve this, I would really enjoy seeing under used spell/units to step up in the VC roster.
Gaze of Nagash! Each missile could do bonus damage to large targets! Given VC excessive weakness to Monsters For this to work Gaze of Nagash would need to deal profound amounts of anti large damage (mitigating armor). Effectively 1/5th HP of a monster unit. Even more so when you take into account VC's units are priced higher for invocation use.
Additionally, Terrghiest are not fully effective in their Anti large role given their cost. I would like to see their breath spell be castable form range 150 range, and gain anti large bonus damage on the breath. Given they only have 3 cast, The breath would need 300 to 400 damage vs large to improve the spell vs some of the 4000 HP large units.